75 results about "Coalbed methane extraction" patented technology

The invention provides coal seam multi-section type directional fracturing and permeation increasing equipment and method, and relates to the technical field of coal mine gas treatment and coal seam gas exploitation, the coal seam multi-section type directional fracturing and permeation increasing equipment comprises a machine body, a propelling mechanism, a fracturing pipe and a liquid inlet mechanism, and a plurality of sets of directional assemblies are arranged outside the fracturing pipe at equal intervals; and the fixing mechanism is used for directionally spraying the high-pressure water to the fixed direction in the coal seam and comprises a limiting component arranged on the propelling mechanism and used for limiting the fracturing pipe stretching into the fracturing seam and a connecting component arranged on the limiting component and used for locking the fracturing pipe. High-pressure water can be directionally jetted to the fixed direction in a coal seam fracturing hole, the situation that due to the fact that the high-pressure water is jetted at will, a large number of cracks are generated on the soft portion of the coal seam, and consequently permeation increasing is uneven is avoided, in addition, a fracturing pipe stretching into the fracturing hole can be fixed, and the situation that the permeation increasing effect is affected due to the fact that the fracturing pipe shakes when equipment runs is avoided.

The invention discloses a soft coal seam nanofluid fracturing propping material and a preparation method thereof.The soft coal seam nanofluid fracturing propping material is prepared from, by weight, 80-90% of a base material, 1-5% of a super-hydrophobic coating, 5-10% of a catalytic active component and 5-15% of a rheological enhancer, the base material is a compound of high-purity silicon dioxide nanoparticles and graphene nanosheets GNP, the particle size of the high-purity silicon dioxide nanoparticles is 50-200 nm, the super-hydrophobic coating is a fluorosilane modified layer, the thickness of the super-hydrophobic coating is 5-20 nm, and the invention relates to the technical field of coal bed gas exploitation. According to the soft coal seam nanofluid fracturing propping material and the preparation method thereof, the surface of the material is provided with a super-hydrophobic coating, friction force with a coal matrix is reduced, high embedding resistance is achieved, the flow conductivity is specifically enhanced, an extra flow channel is provided through a porous nanostructure, the fracturing fluid permeability is improved, and meanwhile gas desorption can be cooperated; catalytic active sites are introduced to the surface of the material to promote adsorption and diffusion of methane molecules.

The invention belongs to the technical field of coal bed gas exploitation and carbon dioxide geological storage, and relates to a coal bed carbon dioxide injectability evolution whole process simulation device and method, and the device comprises a true triaxial stress loading system, a temperature control system, a multi-mode gas injection system, a monitoring system, and a data processing system. The deep stratum stress state and the stratum temperature field are simulated, constant-pressure and constant-current mode carbon dioxide is injected into the true triaxial stress loading system to carry out groutability attenuation and recovery simulation, and nitrogen and pulse mode injection is switched to carry out temperature change regulation and control, phase change regulation and control and frequency change regulation and control so as to simulate groutability improvement. According to the method, a whole-process evolution mechanism of attenuation-recovery-improvement of carbon dioxide groutability is realized, meanwhile, data acquisition and permeability and stress calculation are performed through a monitoring system and a data processing system, and rapid conversion from original data to core parameters is realized; and accurate experimental data support is provided for on-site injection parameter optimization and regulation and control technology research and development.

The invention discloses a coal bed gas exploitation and separation utilization method based on SCCO2 assistance, and belongs to the technical field of coal bed gas development. Supercritical carbon dioxide is prepared through a high-pressure reaction kettle and stored in a supercritical carbon dioxide storage and collection tank, meanwhile, nitrogen mixed with graphene is introduced, and CO2 / CH4 adsorption selectivity is enhanced by means of the characteristic that the specific surface area of graphene is large. A variable-frequency sound wave diffuser is matched to excite coal seam micro cracks through low-frequency sound waves, and supercritical carbon dioxide and nitrogen mixed gas is injected into a coal seam injection well. In the injection process, the sound wave diffuser synchronously radiates high-frequency sound waves to improve the displacement efficiency, then the gas enters the gas separation tower integrated with the molecular sieve membrane, and the produced gas is divided into upper methane, middle carbon dioxide and other bottom miscellaneous gas. Methane is pressurized by an air compressor and then stored in a methane storage tank, carbon dioxide is purified and pressurized and then recycled for coalbed methane exploitation, and offensive gas is cooled and stored after generating power by a steam turbine. And efficient mining, separation and multi-path utilization of the coal bed gas are realized.

The utility model relates to the technical field of coal bed gas exploitation, and discloses a coal bed gas ground well fracturing and yield increasing device which comprises fracturing main body units, fracturing device connecting pieces, variable connecting pieces, a drainage pipe, a hole sealing device and a cable, the fracturing device connecting pieces are installed between the fracturing main body units, the variable connecting pieces are installed at the upper ends and the lower ends of the fracturing main body units, and the drainage pipe is installed between the fracturing main body units. The drainage pipe is installed on the surface of the variable connecting piece, the hole sealing device is installed on the surface of the drainage pipe, and the cable is electrically connected to the fracturing body unit. The coal bed gas ground well fracturing yield increasing device is convenient, stable, safe and efficient for the CO2 fracturing coal bed gas control technology, the direct acting radius of the CO2 fracturing technology is 1.5-5 m, the influence radius can reach 15 m, the gas extraction drilling work amount is reduced by 30%-60%, the duration time of high-concentration and large-flow gas extraction is long, the gas extraction lower limit is effectively reduced, and the gas extraction efficiency is improved. The method is suitable for coal seams with different firmness coefficients, and has a better application effect in coal seams with strong gas adsorbability.

The utility model relates to the technical field of coal gas mining equipment, and discloses an underground coal bed gas mining and desanding device, a top gas pipeline is arranged at the top of a bottom gas pipeline, a desanding and water filtering assembly is arranged between the bottom gas pipeline and the top gas pipeline, and a desanding and water filtering assembly is arranged between the bottom gas pipeline and the top gas pipeline. The desanding and water filtering assembly is arranged between the bottom gas conveying pipeline and the top gas conveying pipeline, the desanding net barrel in the desanding and water filtering assembly can filter large-particle sand contained in conveyed coal gas, and the dust filtering net can filter fine dust again. After activated aluminum oxide powder is filled in the aluminum oxide storage net cylinder, water molecules contained in the coal gas passing through the aluminum oxide storage net cylinder can be adsorbed and removed, so that water and gravel particles contained in the coal gas discharged outwards can be effectively removed and purified; water is prevented from being mixed with dust particles to adhere to the inner wall of the pipeline, and it is guaranteed that coal gas conveying is safer and more reliable.

The invention provides a multilateral well coalbed methane extraction method, which comprises the following steps of: selecting one coal seam with one or more coal seams with higher coalbed methane content above as an extraction coal seam, and arranging a dense rib multilateral well coalbed methane extraction system in the adjacent coal seam at the upper part before coal seam extraction work is propelled to the extraction coal seam, and then coal bed gas extraction is carried out. According to the extraction method, efficient extraction of the coal bed gas close to the coal seam and flowing of the coal bed gas (gas) into the goaf and the roadway are effectively achieved, and scientific guidance is provided for effectively implementing co-extraction of the coal gas in the thin-medium thick coal seam group.

This invention discloses a simulation device for gas and water production in coalbed methane fracturing wells, comprising a base, a support with an arc-shaped cross-section fixed on the base, a wellbore placed on the support, end cap assemblies connected to both ends of the wellbore, a vertical rod fixed to one side of the base, one end cap assembly hinged to the bottom of the vertical rod, a pulley at the top of the vertical rod with a rope wound around it, the rope connected to the end cap assembly at the end furthest from the vertical rod, and a winch at the lower end of the vertical rod for winding the rope. Compared with existing technologies, this invention fully considers the simulation requirements under different working conditions, providing researchers with a comprehensive and controllable experimental platform, facilitating in-depth research on various influencing factors in the coalbed methane fracturing process, and providing a more scientific theoretical basis and experimental evidence for coalbed methane extraction.

The utility model discloses a kind of deep coalbed gas exploitation sampling devices, including shell, the shell inside is provided with inner bag, the hollow inside the inner bag, top and bottom are separately provided with communicating pipe and sampling pipe, the communicating pipe and sampling pipe are respectively worn out shell and with shell sliding connection, the inner bag is slidably arranged with sealing plate, the sealing plate top is fixedly provided with connecting frame, the connecting frame top is penetrated by screw rod and is connected with screw rod, the connecting frame top is provided with recess and the recess is slidably connected with limit rod, the limit rod one end is fixedly connected with inner bag, the screw rod one end is connected with motor fixedly installed in inner bag inside, by setting sampling device in inner bag, put inner bag in shell to protect inner bag, and set spring for buffering between inner bag and shell to buffer external impact force, and by setting counterweight that can be disassembled between each other, it is convenient to adjust counterweight.

The invention discloses a coal mine area coal bed gas full-time-domain extraction and coal gangue filling integrated method, and belongs to the technical field of coal bed gas development, ground gas control and mine solid waste disposal. Constructing a plurality of coalbed methane extraction wells with a three-opening well body structure in the coal mining preparation area, and pre-extracting coalbed methane of an exploited coalbed after high-pressure water jet well completion; before a working face is recovered to a coal-bed gas well, perforation is carried out on an overlying protected layer section, and pressure relief coal-bed gas extraction is carried out through stress release and permeability increasing effects generated by coal mining; and after the goaf is closed, coal bed gas released by coal walls and residual coal is extracted under negative pressure. And after extraction of the goaf is finished, goaf coal gangue grouting filling is conducted through the coal-bed gas well, coal gangue is absorbed, and the ground settlement amount is reduced. According to the method, the same coal-bed gas well is used for full-time-domain coal-bed gas extraction before mining, during mining and after mining and coal gangue goaf filling, the comprehensive cost of coal-bed gas development, gas control and mine solid waste disposal in a coal mine area can be remarkably reduced, and the method has safe, environmental and social benefits.

The invention relates to a backwashing well coal crushing device, and relates to the field of coalbed methane exploitation technology, the backwashing well coal crushing device comprises a coal crushing section located at the bottom end, the top end of the coal crushing section is provided with a coal crushing section, the coal crushing section is relatively communicated with the interior of the coal crushing section, the top end of the coal crushing section is provided with an oil pipe, and the oil pipe is communicated with the interior of the coal crushing section. And the interior of the oil pipe is relatively communicated with the interior of the coal crushing section. The device has the effects of cleaning sediments such as large-particle coal briquettes in a shaft, reducing the influence on underground drainage and mining equipment and prolonging the pump inspection period.

The application discloses a multi-working mode coordinated exploitation well pattern and an exploitation method thereof, and belongs to the technical field of coal bed gas exploitation. The exploitation well pattern comprises a first horizontal well and a second horizontal well, the first horizontal well and the second horizontal well form a communication channel in a target coal bed, and the communication channel is used for selectively accelerating extraction of coal bed gas or serving as a reaction channel for underground coal gasification; and the exploitation well pattern further comprises a multifunctional well, which is communicated with the communication channel. The application constructs a multi-working mode coordinated exploitation well pattern of "double horizontal wells + multifunctional well", realizes the collection of monitoring production parameters, gas production and extraction, injection of carbon dioxide reaction slurry and solidifying fluid in the multifunctional well, realizes the cooperation of CO2 filling, reinforcement, sealing and storage, and solves the problems of lack of special carbon storage channels and difficulty in multi-technology cooperation in the prior art.

The invention belongs to the technical field of coal bed gas exploitation, relates to a self-energizing activated drainage gas recovery process, and introduces a self-energizing technology and a fracturing exploitation technology. In other words, before the self-energizing activator is injected, the fracturing technology is adopted to exploit the coal seam, high-pressure liquid or gas is injected into the coal seam, the coal seam is fractured, cracks are opened, and new cracks and channels are created. The self-energizing activator can increase the permeability of the coal bed, improve the pore connectivity, increase the release rate and collection efficiency of the coal bed gas, increase the quantity of the collected coal bed gas and reduce the waste of coal bed gas resources.

This utility model discloses a coalbed methane extraction device, including a coalbed methane conveying pipe and a coalbed methane extraction pipe. A filter box is located at the junction of the coalbed methane conveying pipe and the coalbed methane extraction pipe. Sealing rings are fitted between the filter box and the coalbed methane conveying pipe, and between the filter box and the coalbed methane extraction pipe. A coalbed methane filter screen is inserted and installed in the middle of the filter box, forming a detachable structure within the filter box. A support assembly is used to support and fix the coalbed methane conveying pipe and the coalbed methane extraction pipe. This coalbed methane extraction device is easy to assemble and position. Furthermore, the support assembly provides stable support for the pipeline. The pipeline is fitted with an elastic buffer strip, which provides cushioning protection when the pipeline vibrates during transport. The coalbed methane filter screen installed in the filter box can also filter solid impurities in the extracted coalbed methane.

The present application relates to coal bed gas mining technical field, especially to a kind of coal bed gas well multifunctional pump, including multifunctional pump pump cylinder, adjustable height and rotationally arranged in multifunctional pump pump cylinder mobile valve assembly and fixed valve assembly being arranged at the bottom end of multifunctional pump pump cylinder, the top of mobile valve assembly is connected to sucker rod, the top of multifunctional pump pump cylinder is connected to multifunctional pump, and fixed valve assembly is used to communicate coal bed gas well and multifunctional pump pump cylinder;The mobile valve assembly includes hollow draw tube, mobile valve cover, center nozzle and mobile valve.The present application uses sucker rod, hollow draw tube as high-pressure cleaning liquid manifold, annulus between multifunctional pump pump cylinder and hollow draw tube as cleaning liquid flow-back channel, so that cleaning liquid does not enter well, and the purpose of protecting reservoir is achieved.

The invention discloses a method and a device for fixed-point modification of a coal adsorption position based on infrared detection-pulsed nanoparticles, and relates to the technical field of coal mine safety engineering. According to the method, infrared is used for detecting the surface of a coal sample, an adsorption potential distribution diagram is drawn through emissivity data, and a high / low-density area is identified. The nanoparticles-containing foams are directionally delivered to a target area according to a modification target (enhancing or weakening adsorbability), and enrichment is guided by means of a magnetic field. Then, laser irradiation is adopted to enable the coal matrix to be heated in a transient state, and fixed-point transformation of the adsorption site is achieved. Finally, the effect change is verified through infrared scanning and methane adsorption testing. According to the method, fixed-point weakening and enhancement of the adsorption position can be achieved, and a new technical approach is provided for improving the coal bed gas exploitation efficiency and reducing the coal and gas outburst risk.

The present application relates to greenhouse gas emission management and coal bed gas exploitation technical field, disclose a kind of coal bed gas exploitation intelligent emission reduction system and method based on dynamic carbon footprint accounting, system includes data perception layer, dynamic database layer, accounting engine layer and decision control layer, data perception layer real-time acquisition full life cycle energy consumption and emission data, dynamic database layer is based on measured data dynamic update emission factor, accounting engine layer calls dynamic factor, real-time calculation product carbon footprint, decision control layer generates and executes emission reduction strategy according to accounting result, and can be warned when emission is over standard.This application corrects general emission factor through measured data, significantly improves the accuracy and timeliness of accounting;Build a closed loop of "monitoring, accounting, early warning and control", realize the change from passive reporting to active emission reduction;And by tracing the emission to single well and single process, support fine management and process optimization.

This application provides a system and method for extracting coalbed methane (CBM) through cascade heating and circulating injection into coal seams, belonging to the field of CBM extraction. It solves the problems of low energy efficiency, difficulty in separating injected CO2, and water lock caused by injected steam in traditional methods. The system includes a CBM circulating injection and extraction system deployed in the target coal seam, a cascade circulating heating system, and an intelligent control system. The cascade circulating heating system includes surface preheating equipment, downhole enhanced heating equipment, and gas circulation energy enhancement equipment. The surface preheating equipment is used to initially heat the CBM before injecting it into the CBM injection wellbore, and then the downhole enhanced heating equipment performs secondary heating on the CBM. The gas circulation energy enhancement equipment is used to back-transport a portion of the CBM output from the extraction well to the cascade circulating heating system. This application achieves safe and efficient CBM extraction by constructing a three-dimensional well network, a surface and downhole cascade circulating heating system, and gas circulation energy enhancement.

The geothermal energy storage system comprises a ground heat collection unit, a heat injection energy storage unit and a co-production unit, and the ground heat collection unit collects solar energy and wind-solar excess electric energy and converts the solar energy and the wind-solar excess electric energy into high-temperature heat energy; the heat injection and energy storage unit comprises a heat injection device, an injection well, an extraction well, an artificial heat storage space, an upper cover layer and a lower cover layer, the part, located between the injection well and the extraction well, in the non-coal mining layer is transformed to form the artificial heat storage space with the permeability of 10-100 mD, and the heat injection device is connected with the ground heat collection unit and the injection well. High-temperature heat energy is injected into the artificial heat storage space to be stored, and the adsorbed coal bed gas in the artificial heat storage space is desorbed into a free state; the co-production unit is connected with the extraction well, supplies heat / cold through high-temperature heat energy, and recovers free-state coal bed gas for gas supply and power generation. In this way, non-coal mining seam resources are developed, solar energy and wind and light excess energy are consumed, and efficient geothermal energy storage and stable power generation heating / cooling are achieved.

This invention belongs to the field of coalbed methane extraction technology in mining wells. The purpose is to provide a gas concentration extraction device and method for mining wells traversing unmined coal seams, achieving single-well gas concentration extraction and improving the utilization rate of high-grade resources. The technical solution is as follows: a gas concentration extraction device for mining wells traversing unmined coal seams, wherein a packer is fitted onto the lower part of the tubing, and a guide shoe is fixed to the lower end of the tubing. The packer is located between the lower mined coal seam and the adjacent upper unmined coal seam. A first compressor is connected to the annular gas production channel; a second compressor is connected to the tubing gas production channel. The extraction method involves starting the first and second compressors to perform negative pressure extraction on the annular gas production channel and the tubing gas production channel, respectively. A dynamic control mechanism based on concentration feedback is used to adjust the extraction power of the tubing gas production channel to ensure that the gas concentration output from the annular gas production channel stably meets the requirements of the gathering and transmission network. This invention is used for gas extraction in mining wells.

The invention belongs to the technical field of coal bed gas exploitation. According to the method for changing the abandoned high drainage roadway into the mining horizontal well, the abandoned high drainage roadway and a directional vertical well are integrated to serve as a novel mining horizontal well for gas treatment of a coal face, and the continuous gas production time of the coal bed gas mining vertical well is effectively prolonged. According to the technical scheme, the method comprises the following steps: S1, determining a spatial distribution range of a structural fracture area above a stope face; s2, determining the spatial position relationship between each abandoned high-pressure drainage roadway and the structural fracture area around the stope face; s3, preferably selecting the abandoned high-pressure drainage roadway; s4, organizing equipment to enter the site; s5, drilling for the first time; s6, drilling for the second time; s7, drilling is conducted for the third time, and drilling is stopped at the drilling fluid leakage position; s8, carrying out segmented hole blowing operation; s9, an air screw drill is tripped in, the air screw drill penetrates through a top plate of the waste high-pressure drainage roadway and drills to the position close to a bottom plate, drilling is stopped, and a production screen pipe is tripped in; and S10, a wellhead device is installed. The method is used for mining the coal bed gas above the stope face.

The invention discloses a method and device for analyzing the sensitivity of methane gas adsorbed by coal to temperature and pressure, and the device comprises a pressure stabilizing system of a press for applying axial pressure to an adsorption container and keeping the pressure stable, and a precision heating furnace for heating the adsorption container arranged in the precision heating furnace; the gas adsorption earthenware is a cylindrical metal container and is used for loading a coal sample, high-temperature-resistant sealing gaskets are arranged at two ends of the gas adsorption earthenware, and the gas adsorption earthenware is connected to a gas source and a metering system through pipelines; the gas storage tank and the gas metering device are used for storing methane gas and accurately metering the gas volume change in the experiment process; the vacuum system is used for vacuumizing the adsorption tank and the pipeline before an experiment; and the data acquisition system is used for synchronously acquiring and recording temperature, pressure and gas volume data in the adsorption pottery in real time. According to the method, optimization of a coalbed methane exploitation scheme can be guided, when the depressurization desorption effect is poor, the adsorption capacity can be reduced by 30% or above by adopting heat injection (such as 200 DEG C), and the exploitation efficiency is improved.

The utility model discloses a coal-bed gas well extraction and drainage arrangement structure which comprises a vertical shaft vertically and downwards penetrating through a coal reservoir, and the lower end of the vertical shaft extends into a rock stratum below the coal reservoir; a plurality of layers of radial extraction sections are arranged in the coal reservoir around the vertical shaft in the vertical direction; a casing pipe is arranged in the vertical shaft, a plurality of vertical drainage channels are arranged on the outer circle of the casing pipe, well cementation gravel blocks are filled between any two adjacent vertical drainage channels in the vertical shaft, and an inner port of each layer of radial extraction section is communicated with the interior of the casing pipe. And a plurality of water guide pipes are uniformly arranged at the interface between the bottom of the coal reservoir and the rock layer on the wall of the sleeve along the circumferential direction. The plurality of layers of radial extraction sections are uniformly arranged in the circumferential direction of the vertical shaft, so that the vertical shaft is particularly suitable for a thicker coal reservoir, the extraction range of the vertical shaft in the radial direction is extended, the extraction yield of a single well is improved, a smooth drainage channel is designed, moisture in the coal reservoir is reduced, and the drainage efficiency is improved. Therefore, economy, high efficiency, safety and stability of coal bed gas exploitation are guaranteed.

The invention relates to the technical field of coal bed gas exploitation, in particular to a steam and supercritical CO2 synergistic fracturing intensified coal bed gas exploitation system and method.The system comprises a steam injection system, a supercritical CO2 injection system and a coal bed gas extraction system. The method comprises the following steps: firstly, injecting supercritical CO2 into a well, increasing the temperature in the coal seam to keep the temperature in a higher range while generating cracks, then injecting supercritical CO2 into the well, further fracturing the cracks of the coal seam after the supercritical CO2 reaches a horizontal fracturing section from the interior of the well, and competitively adsorbing with coal bed gas to occupy the adsorption position of methane, so that methane is desorbed; and due to the thermal conductivity of the coal bed, the supercritical CO2 can become CO2 in a common state in the competitive adsorption process of the supercritical CO2 and methane, and further development of cracks is caused by volume expansion, so that the desorption amount of the coal bed gas is increased.

The invention provides a primary coal dynamic humidity adsorption and desorption deformation simulation device and method. The simulation device comprises a humidity generator for storing a prefabricated salt solution, and the humidity generator is communicated with an adsorption expansion unit provided with a strain gauge coal sample and a sample tank for monitoring humidity; pipelines at the front ends of the humidity generator, the adsorption expansion unit and the sample tank are respectively connected with valves, and the other end of a connecting pipeline of the adsorption expansion unit is externally connected with an air adjusting unit; the humidity generator and the adsorption expansion unit are respectively connected with the data acquisition unit. The simulation method comprises the following steps: preparing a coal sample; selecting a saturated salt solution to simulate a preset humidity environment; assembling, checking and debugging the device; carrying out dynamic humidity adsorption and desorption simulation and collecting required data; and drawing a strain-time curve graph, and fitting strain and pressure evolution diagrams. The influence of pressure and relative humidity on gas adsorption and desorption and the gas production rate in gas extraction and coal bed gas exploitation is effectively solved, and the exploitation benefits of gas and coal bed gas are effectively improved.

The invention discloses a multidirectional water jet three-dimensional cutting anti-reflection method based on a roadway loosening circle, and relates to the technical field of coal bed gas exploitation, oil and gas well yield increase and mine disaster prevention and control. According to the method, firstly, multi-directional water jet three-dimensional cutting anti-reflection equipment composed of a water tank, a high-pressure water pump, a drilling machine, a drill bit, a drill rod and a rotatable jet nozzle is prepared, and then the equipment is adopted for conducting graded precise anti-reflection on different stress partitions; a plastic crushing section, a stress concentration section, an elastic deformation section and a primary rock stress section are sequentially divided from outside to inside in the axis direction of a drill hole, large-size and small-size caving is carried out on the primary rock stress section, annular slotting is carried out on the elastic deformation section, and star-shaped ray slotting is carried out on the stress concentration section. Compared with a single slotting mode, the slotting mode adapting to different stresses can improve the permeability by 10-25 times, cooperative pressure relief is achieved, and the slotting mode is suitable for efficient permeability increasing of various stratums such as coal seams, shale and sandstone.

The invention discloses an intelligent regulation and control system and method for coal bed gas exploitation and CO2 storage through variable-component flue gas drive, and belongs to the technical field of coal bed gas exploitation and CO2 storage. The system comprises a variable component injection module, a multi-parameter distributed sensing network, an extraction and utilization module, a digital twinborn model, an AI intelligent regulation and control engine and a safety interlocking and emergency response module. The component-variable injection module is used for realizing adjustment of CO2 / N2 proportion, pressure, flow, temperature and humidity; the sensing network realizes high-frequency panoramic monitoring of the whole injection-extraction process through a plurality of sensors; the digital twinborn model is coupled with permeability evolution, adsorption and fracture diversion models to realize real-time inversion of key parameters; the AI engine outputs an optimal injection strategy based on LSTM prediction and a PPO reinforcement learning algorithm; and the safety interlocking and emergency response module triggers emergency response at a millisecond level during overrun. According to the system, collaborative optimization of the coalbed methane recovery rate, the CO2 storage rate and the operation energy consumption is achieved, and normal form transformation from blind injection to intelligent regulation and control is completed.

The application discloses a kind of deep coal bed gas exploitation gas pressure measuring device, it is related to coal bed gas exploitation gas pressure detection technical field.The present application includes gas pressure measuring meter, one end of both sides of gas pressure measuring meter is fastened and connected with connecting assembly, connecting assembly includes connecting piece and first through-hole, first through-hole is arranged in the middle part of the surface of connecting piece one side end, a pair of second through-hole is arranged in the middle part of the surface of connecting piece other side end, and Bluetooth module is fastened and connected in the middle upper part of the back surface of gas pressure measuring meter.The present application has the advantage of detecting the gas pressure in different depth coal gas layer by setting connecting assembly, solves the existing gas pressure measuring device, usually the device is directly placed in the environment that needs to be detected gas pressure, after a period of time, the gas pressure value displayed on the display screen of the device is directly watched, when detecting the gas pressure at deep coal bed gas, it cannot be placed and fixed artificially, thereby leading to the problem that it is difficult to detect the gas pressure at different depth coal bed gas.

The utility model discloses a coal bed gas vertical well layered extraction system which comprises a vertical well vertically and downwards penetrating through a coal reservoir, and a plurality of layers of radial extraction sections are arranged in the coal reservoir. A casing pipe is arranged in the vertical shaft, a vertical drainage channel is arranged on the outer circle of the casing pipe, and an inner port of each layer of radial extraction section is communicated with the interior of the casing pipe. A derrick is arranged above the mouth of the vertical shaft on the ground, a lifting device is arranged on the derrick, and a steel wire rope of the lifting device is connected with a sealing gas gathering extraction device which can move up and down along the casing pipe and is communicated with an inner port of each layer of radial extraction section in a hanging mode. The plurality of layers of radial extraction sections are uniformly arranged in the circumferential direction of the vertical shaft, so that the vertical shaft is particularly suitable for thicker coal reservoirs, the extraction range of the vertical shaft in the radial direction is extended, the coal bed gas extraction process is simple and easy to implement, the single well extraction yield is improved, a smooth drainage channel is designed, water in the coal reservoirs is reduced, and the coal bed gas extraction efficiency is improved. Therefore, economy, high efficiency, safety and stability of coal bed gas exploitation are guaranteed.

The invention discloses a coal bed gas fracturing fluid system and a multi-crack balanced expansion method, and relates to the technical field of coal bed gas exploitation, the coal bed gas fracturing fluid system comprises a main liquid base as a conveying medium, ceramsite as a proppant, a coated heat generation microcapsule and a self-response diverting agent; the heat-generating microcapsule core material is a solid substance capable of releasing heat when encountering water, and a coating layer of the heat-generating microcapsule core material has a temperature response characteristic, becomes soft and cracks when reaching a temperature threshold value, and releases heat to reduce the viscosity of fracturing fluid; the self-response diverting agent is of a core-shell structure, and a shell of the self-response diverting agent is hydrolyzed at a specific temperature and PH, so that an inner core elastomer absorbs water to swell, wide cracks can be blocked autonomously and selectively according to the width of the cracks, and fracturing fluid is guided to divert to narrow cracks which are not fully expanded. The method comprises the following steps: injecting prepad fluid containing coated heat generation microcapsules; adding a proppant and a diverting agent, and pumping sand-carrying fluid; and finally, the well is closed and closed, and flowback is controlled. The fracture diversion effect can be optimized, multiple fractures are expanded in a balanced mode, and the mining efficiency is improved.